A spiritual being is an object and would be described as a noun...the devil is a spirit...God is a Spirit..we know they have action and effect ...
you have to deny the clear reading of the passage to believe as you do... I often agree with you...but your just wrong here
Ro 7:17 Now then
it is no more I that do it, but sin that dwelleth in me.
18 For I know that in me (that is, in my flesh,) dwelleth no good thing: for to will is present with me; but how to perform that which is good I find not.
19 For the good that I would I do not: but the evil which I would not, that I do.
20 Now if I do that I would not, it is no more I that do it,
but sin that dwelleth in me.
21 I find then a law, that, when I would do good, evil is present with me.
This is clearly a spiritual force called "sin" that is in the flesh..clearly its is being used as a noun..not a verb